Update draco.md

docs/tools/draco.md

@@ -1,6 +1,6 @@
 # Draco: a Chemical Data Extractor
 
-[Draco] is a tool which aims to extract chemical data (Molecules, Reactions, procedures, etc.) from documents. In its first version, Draco focuses at extracting molecules (fragments and complete structures) from PDF documents
+[Draco] is a tool that aims to extract chemical data (Molecules, Reactions, procedures, etc.) from documents. In its first version, Draco focuses at extracting molecules (fragments and complete structures) from PDF documents.
 
 ## File Inputs
 
@@ -12,14 +12,18 @@ Upload a PDF file containing chemical structures to extract to the Data Hub.
 
 ### Output Files
 
-Draco produces an .xlsx (Excel) file which contains all the extracted chemical strucutres for a given document. Each row contains the extracted image, the predicted image, the predicted SMILES, the confidence score and the confidence score associated to each token in the SMILES
+Draco produces a .xlsx (Excel) file that contains all the extracted chemical structures for a given document. Each row includes the extracted image, the predicted image, the predicted SMILES, the confidence score, and the confidence score associated with each token in the SMILES.
 
 ## Running Draco on Deep Origin
 
 To run Draco on Deep Origin, follow these steps:
 
 ### 1. Create a database to store input and output files
 
+Create a Column containing the PDF files and an output column, which will store the output files. The type of these columns is File.
+
+![draco_database_example](https://github.com/user-attachments/assets/926a4f06-3c27-4b4b-9b47-79fc98e96723)
+
 ### 2. Start a tool run on Deep Origin
 
 To start a tool run, use:
@@ -56,3 +60,16 @@ To wait for the tool run to finish, use:
 from deeporigin.tools.utils import wait_for_job
 wait_for_job("9f7a3741-e392-45fb-a349-804b7fca07d7")
 ```
+
+## Example
+Using the database shown above in section "1. Create a database to store input and output files", the code to extract molecules from the uploaded document (patent_test.pdf) is:
+```python
+from deeporigin.tools import run
+
+job_id = run.draco(
+    database_id="draco_use_case",
+    row_id="draco-use-case-1",
+    input_file_column_name="Document"
+    output_column_name="Result"
+)
+```